Plan for your next birthday
The birthday countdown measures whole calendar days from today to the next occurrence of your birth month and day. It also shows the full date, weekday, and the age you will reach, which can be useful for invitations, travel planning, milestone celebrations, or simple curiosity.
What happens on your birthday?
If today's local calendar date matches the entered month and day, the result displays “Happy birthday!” and shows zero days remaining. The calculation uses the date and time settings on your device.
February 29 birthdays
Leap-day birthdays need a convention in non-leap years. JavaScript calendar behavior can roll February 29 into early March when that date does not exist. Legal and cultural birthday rules vary by location, so confirm the applicable rule for eligibility or official deadlines.
The countdown is intended for planning and entertainment. For an exact age broken into years, months, days, hours, minutes, and seconds, use the main chronological age calculator.